Pipeline refurbishing
A novel process for simultaneously removing deteriorated coatings (such as coal tar and asphalt enamel or tape) and providing surface preparation suitable for recoating has been developed for pipelines up to 36 in. (914 mm) in diameter. This patented device provides a near-white metal surface finish. Line travel or bell-hole operations are possible at rates up to 10 times conventional blasting techniques. This article describes development of a tool and machine that will remove pipeline coatings, including coal tar enamel and adhesive-backed plaster tape systems. After coating removal, the pipe surface is suitable for recoating and can be cleaned to a near-white metal finsh (Sa 2 1/2 or NACE No. 2) if desired. This cleaning system is especially useful where the new coating is incompatible with the coating to be removed, the new coating requires a near-white or better surface preparation, or no existing method has been found to remove the failed coating. This cleaning system can remove all generic coating systems including coal tar enamel, asphalt, adhesive-backed tape, fusion-bonded epoxy, polyester, and extruded polyethylene.
- Research Organization:
- Shaw Pipe Protection Ltd., Rexdale, Ontario (CA)
- OSTI ID:
- 6004745
- Journal Information:
- Mater. Performance; (United States), Journal Name: Mater. Performance; (United States) Vol. 28:4; ISSN MTPFB
- Country of Publication:
- United States
- Language:
- English
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